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GH-103971: Forward-port test from GH-103980 (GH-103984)

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Tian Gao 2023-04-28 13:25:48 -07:00 committed by GitHub
parent 689723a4ab
commit 79b9db9295
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1 changed files with 13 additions and 0 deletions
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Lib/test/test_patma.py
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@ -3165,6 +3165,19 @@ class TestTracing(unittest.TestCase):
self.assertListEqual(self._trace(f, "go x"), [1, 2, 3]) self.assertListEqual(self._trace(f, "go x"), [1, 2, 3])
self.assertListEqual(self._trace(f, "spam"), [1, 2, 3]) self.assertListEqual(self._trace(f, "spam"), [1, 2, 3])
def test_unreachable_code(self):
def f(command): # 0
match command: # 1
case 1: # 2
if False: # 3
return 1 # 4
case _: # 5
if False: # 6
return 0 # 7
self.assertListEqual(self._trace(f, 1), [1, 2, 3])
self.assertListEqual(self._trace(f, 0), [1, 2, 5, 6])
def test_parser_deeply_nested_patterns(self): def test_parser_deeply_nested_patterns(self):
# Deeply nested patterns can cause exponential backtracking when parsing. # Deeply nested patterns can cause exponential backtracking when parsing.
# See gh-93671 for more information. # See gh-93671 for more information.